Book-stapling machine.



No. 832,681. 'PATENIBD OCT. 9, 1906. A. E. LIND.

BOOK STAPLING MACHINE. APPLICATION FILED rEB.6.19o5.

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A. E. LIND. BOOK ST'APLING MACHINE.

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APPLICATION FILED FEB. 6. 1905.

No. 332531;. PATENTED 00119, 1906.

. A. E. LIND.

BOOK STAPLING MACHINE.

APPLICATION FILED 1113.6. 1905.

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ZZQZW PATENTED OCT. 9, 1906.

A. E.. LlND. BOOK STAPLING MACHINE.

APPLICATION FILED FEB. 6.1905.

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No. 832,681. PATBNTED OCT. 9, 1906. A. B. LIND.

BOOK STAPLIN G MACHINE.

APPLICATION FILED FEB.6. 1905.

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JXGZEZ 1779.

.AXEL E LIND, OF C HIUAGQ ILLINOIS. ASSIGNOR TO GALLAHER AND SPECK, OF CHICAGO, ILLINOIS, A ('lOPARTNERSI-IIP.

BOOK-STAPLiNGr MACHINE- Specification of Letters Patent.

Patented Oct. 9, 1906.

Application filed February 6, 1905. Serial No. 244.445.

To (LZZ whom, it may concern:

Be it known that I, AXEL E. LIND, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Bool-Stapling Machines; and I hereby declare the followingto be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improved machine for stitching books or the like with wire staples, and particularly that class of machines which automatically feeds and cuts the wire and forms and drives the staples; and it consists in the features of construction and combinations of parts hereinafter fully described and claimer In the accompanying drawings, illustrating my invention, Figure 1 is a side elevation of a machine made in accordance with my invention having a portion broken away and the cover of the stitching-head removed in order that the working parts may be more clearly seen. Fig. 2 is a front elevation of the stitcli big-head and accompanying parts. Fig. 3 is a fragmentary view similar to, Fi 2, but showing the feed mechanism at the opposite limit of its movement to that shown in Fig. 1.

Fig.4 is a detail horizontal section on the line 4 4 of Fig. 3, but shmving some parts in slightly different positions. Fig. 5 1s a side elevation, partly in section, of the-vise for clamping the wire while it is being cut and the staple is being formed. Fig. 6 is a fragmentary front elevation similar to Fig. 3, but showing the staple-driving plunger in an intermediate osition. Fig. 7 is a fragmentary verti'ca section on the line 7. 7 of Fig. 6. Fig. '8 is a fragmentary front elevation simi lar to Fig. 6, but showing the staple forming and driving plungers at the extreme lower limit of their movement. Fig. 9 is a fragmentary vertical section on the line 9 9 of Fig. 8. Fig. 10 is a detail fragmentary view of the staple-forming plungers and heads'in the )osition where thestaple is completed. Figs. 11 and 1 2 are enlarged views of the stapleclenching head,

those shown in Figs. 8 and 10, respectively. Fig. 13 is a detail perspective view of one of the clenching-jaws. Figs. 14,15, 16, and 17 are views show-in; various details of the shown in positions similar to sta le-forming mechanism. Fig. 18 is a centra vertical section of the device for straight ening the wire before it enters the feed mechanism. Fig. 19 is a fragmentary diagram matic view of a portion of the feeding and cutting mechanism. Fig. 20 is .a fragmentary detail horizontal section on the line 20 20of,

Fig. 3. Fig. 21 is an enlarged detail vertical section on the line 21 21 of Fig. 3. Fig. 22 is a detail vertical section of the movable clamp of the feed mechanism on'the line 22 22 of Fig. 21. Fig. 23 is an enlarged side elevation of the adj ustable block which carries the cutting mechanism. Fig. 24 is a perspective view of the member which carries the lnoyable knife. Fig. 25 is a vertical sectionon the line 25 25 of Fig. 23. Fig. 26 is a view in perspective, partly in longitudinal section, of the adjustable member to which the stationary knife is secured.

'In machines of this kind, the Wire from which the sta gles are formed is carried by the machine on..a spool and is drawn therefrom by the feed mechanism which feeds the Wire forward sufficient for each staple as the same 1 is required. After the feed mechanism has come to rest the .wire is cut and the staple is formed from the severed end, driven through the book, which has been placed in proper position by the operator, and the free ends are then bent over and clenched on the opposite side of the book, thus securely fastening the staple in place.

My invention relates more particularly to improvements in-the details of the various devices by which the different steps are performed, to the end that the necessary adjustments to sew books of differenttlncknesses can be more easily and accurately made and also the work done by each device Wlll be more accurate and satisfactory.

In order that my inventionmay be more clearly understood, I will now call attention in detail to the particular points wherein my machine is an improvement over others.

As the wire which is used for this purpose is rather still', it acquires a certain set or curvaturc by being wound on the reel by means of which it is mounted upon the machine, and it is consequently necessary to straighten the wire to a small extent, so that as it is fed into the niachine the free 7 end will follow the proper course. To accomplish this, I- have that the sta usually accomplished as in my machine by the Wire passes as the clenching my device, I form the clenchers m such a said itsprop'er path,

pt he ta said step e as ths driven. One portion of ing the free ends of with said shaft, as desired, to rotate the same in'a well-known manner. 'A face-plate 7 is secured to he forward end of said bearing '3, which is adapted to carry the. operat- 'ing mechanism for feeding and cutting the wire and forming and driving the staple. A bracket -8, integral with said standard '1 and provideld'la very sim le straightening device which is easilyan quihkly adjustable to guide the wire relation tothe feed mechanism in such a manner that any tendency which the wire might have to spring but of the, proper course will be destroyed. The next step is the feeding of the wire. This is astationary and, a reciprocating head, each provided 'with a clamping device. I have provided means whereby the clamping deyice carried'by the reciprocatingv head is positively ppened after the'wire has-,beenirioved forward, so that as the head returns to its prigi nal position the clam does not drag on the wire, but passes free y over same. As through the staple-forming .devicethe free end sometimes springs out of 'due to slight irregularities, Y an to revent this I have provided a guide :hich orces it positively into its proper position. In-driv ng' a-wire staple. of this-kind '1 t i s necessary to su,pport the staple on all sides until it enters the material it is being driven into,- so] that 'it wilLnot bend or' buckle. To accom lish this, a movable head is requiredwhichwi enter between the prongs 1e and be forced out of the path of able plates 9, upon which the book to be stapled may be placed in position to receive the staple. Said bracket 8 also carries the clenching devices, which will be described hereinafter. I will now proceed to describe the mechanism for feeding and cutting'the wire an forming and driving the staples ,in the order mentioned.

Said drive-shaft 2 is provided on its forwardend adjacent said plate 7 with a cam 10 which is adapted,. by means of camgrooves and surfaces and crank-pins carried on its front and rear faces, to operate the feeding, cutting, forming, and driving mechanism which is mounted upon said plate 7. Saidplate 7 carries a horizontally-projecting arm 11 at one side, upon the outer end ,o which a reel 12 is revolubly mounted, which are'to be made. Said reel is prevented from revolving too freely by means of a-springwasher 14, which is secured on the end of the spindle upon which said reel .is mounted. Said wire 13. is guided operating mechanism through a (iurved tube '15,'whi'ch is carried by a horizontally-disposed arm or rod 16, slidihgly mounted in a tube or bracket 17, integral with said arm 11. Said arm 16 is heldat one limit of its movement by means of a spring 18, mounted within said bracket 17, and is adapted to be drawn toward the plate 7 as the wireis fedinto the machine in order'that the feed'mechanism ma be relieved of the strain of startingthe ree into motion in an obvious manner. To straighten the wire before itpenters the feed mechanism, it wire-straightening device "'19, i which comprises rolls 20, mounted one above the other in a frame 21 and each provided, with a groove in its'jouter surface, said 'groovesco- [acting to form a passage or guide for the wire between the meeting faces of the rolls. Said frame is adjustably mounted on a bracket 22, :whichis integral with a portion ofthe feed device, by ineans of a horizontally-disposed I trunnion 23, integral ,with said frame 21 ,and which is adaptediiobe held in a cylindrical opening in the me'ans of the frame21 and rolls th give tion consists'in roviding improved means or' ositively ho ding sai'd movable headout of he path of the staple until just as it is formed. After the sta le' is drive it is necessary ,to hold same iiimly in p0 'tio'n .while the free ends are being bent'over, so I he will have the proper form when finishe I provide means whereby the .lunger which drives'the staple is positively field against the head of the staple untilthe ends have been turned.

. One important pertion of my invention relates to the particular means used for-bendstaples to clench same. It is necessary to provide a small pocket into which the ends of the staple may roject as it is driven through the book, and mechanism has eenformed heretofore this pocket would get 0 ogged with portions of wire and paper, and thus prevent the clenchers from operating properly. In

manner that anything which might enter aid pocket will beforcibly" ejected every time that a staple is clenchedwithout doing any harm to the ap aratus. I

o these andot er ends I have provided the dnachinewhich islcl'early illustrated in said drawings, in whichv ,1' is ,a hollew standard or supportjintheupper end of which the 'driv'e-s'hafti'lis moun d in u t b eb arings 3fand4, .21 ive: ulley is. mounte fon the' rear.- end of aft 2 a clutch 5 is previded," operatedb' ,a foot-lever 16, by means of which said puleyvinay be thrown into engagement i said plate 7, tliereby ith ifil'. the

carries thewire ,13, from .which the staples.

is first passed through the below said bearing 3', is adapted to carry suitfrom said reel to the free fendof said bracket 22 by set-screw 24. To adjust/said I the wire thedesired set, said framerpay be revolved ina vertical 'plane about said triinnion as a (sento bear on the wire 13 and .3

- pendicular distance from said.

through a space equal to the desired direction through the feed apparatus by sliding said trunnion endwise through'its support.

As said wire leaves the straightening device 19 it enters the feed mechanism, which is in horizontal alinement therewith and which I will now describe. Said feed device is adapted to feed the wire a predetermined amount to the forming and driving plungers at intervals and comprises 'a stationary clamping device 25 and a movable or reciprocating clamping device 26. Said stationary clamping device comprises a block or head 27, which is horizontally adjustably mounted on said plate 7 and is provided on one side with the bracket 22, upon which said straightening device 19 is mounted. Said ead 27 is provided adjacent its lower end with a horizontally-disposed shelf 28, over which said wire .13 is adapted to be drawn. Each end of said shelf is provided with pro jections 29, between which said wire is adapted to pass and be guided thereby over said shelf. To grip said wire in said stationary device 25, a swinging lever 30 is pivotally mounted on the face of said head 27 above said shelf and is provided in its lower end. with a hardened cylindrical jaw 31, adapted grip the same between said jaw and said shelf. To effect this, the total length from the pivot of the lever 30 to the extreme point on the periphery'of said jaw is slightly more than the per pivot to the upper surface of the wire as said wire lies upon said shelf, and'said lever is free to swing in a forward direction to free the wire as it is drawn through said cl-utch. To force said clutch to grip the wire and prevent any tendency to its moving backward through same, a spring 32 is provided, one end of which is secured to said lever 30 near its free .end and the opposite end to a post 33 near the upper end of said head 27 and is so arranged that it will normally hold said jaw 31' in contact with said wire andin position to grip same. Said jaw 31 is made cylindrical, so that there will be provided the largest number of teeth to beused for gripping said wire, and as the teeth which are in use become dull said jaw may be rotated in said lever to bring a different portion into action, thus in time making use of the whole periphery. To hold said jaw from revolving when gripping the wire and also to permit of its rotation distance between two or more teeth when desired, a clamp 34 is secured on the edge of said swinging lever 30 by means of the screw 35, its free end being adapted to engage the periphery of said jaw. Said reciprocating clamping device 26, which is adapted to grip the wire and carry it forward the predetermined distance when it is moved in one direction, comprises thehead 36, which is horizontally movably mounted 36 is provided with pin 45 being rigidly Y on the two horizontal guide-rods 37, which are rigidly mounted in said head 27 at one end andin a second stationary head 38 at their other ends. Said second stationary head is adapted to carry the cutting mechanisin, which will be described later. Said head lindrical 40, and a clamp 40*, similar tr those on' said head 27. Sand reciprocating clamping device is normally held in contact with said stationary clamping device 25, so that as it begins to. the wire it will always begin to move from a definite relative position. The length of the staple is determined by the distance that said reciprocating clutch'26 is movedforward or away from said stationary clutch 25 at each revolutionof the drive-shaft 2. To feed the wire forward at definite times in relation to' the working of the other parts of the machine, an oscillating lever 41 is pivot-ally mounted between its ends on said plate 7 above said clutch members and is bifurcated at its lower end to embrace a horizontally-projeating pin 42, rigidly mounted in the back of said reciprocating head 36, whereby when said lever is moved in one direction said clutch device 26 will. be moved forward to feed the wire. The upper end of said lever 41 is provided with an antifriction-roller 43, which is adapted to be engaged l) the periphery of said cam 10 at intervals, whereby said lever 41 will be moved in one direction the required distance. To return said lever 41 to its original position, and consequently said reciprocating clutch 26 into contact with said stationary clutch 25, a coiled. spring 44, Fig. 20, is provided, one end of which engages the head of the pivot 45, upon which said lever 41 is mounted; and the other end engages said lever, said spring being mounted within the hub of said lever. In order that said lever 41 may be adjusted to feed the desired length of wire, it is mounted so "as to be adjusted from and toward said cam. As it is moved toward said earn the cam as it revolves will engage said roller sooner and oscillate said lever through a greater arc, and consequently move said reciprocating head a longer distance, andvice versa. To accomplish this, said lever 41 is mounted on a plate 45*, Fig. 20, which is adjustably mounted on the back of said plate 7 and is provided with a projection 46, adapted to lit a horizontal slot or opening 47 in said plate 7. Said plate 45 is adjusted by means of a screw-threaded projection 48, which is adapted to be engaged by a hand-wheel 49, which is revolubly mounted on the back of said plate 7 and is held against relative longitudinal movement, said pivotmounted in said plate 45 in an obvious manner. In order to be able to adjust said lever 41 so as to produce staples of a definite length, I provide a plate50, mounted on said pivot 45 between said lever a swinging ,lever 39, a cy- I move forward and feed loo . on said plate I it sometimes occurs and said plate 7, on which a'horizontal scale .51 is engraved er,.,marked in any suitable manner. A stationary pointer 52 is mounted 7 adjacent said. scale, so that the position of said lever 41 may be accurately determined. The divisions of said scale may be such as toindicate staples of a proper length for books of definite thicknesses or to indicate staples of a certain definite length. In the operation of similar feed mechanism that the wire clutch on the reciprocating'head will" not let go of the wire as it begins its return movement onac count of the teeth ,of the clutch being wed ed so firmly into the wire. I hate provided means to overcome this difficulty which positively open said clutch at the forward limit of its movement and also a means for positively closing it again at the opposite limit of its movement or when it is brought into contact with said stationary clutch. I provide a lever 52, pivotally mounted between its ends on the side face'of said head 36, which is opposite to said stationary head 27, andwhich lever-52*is adapted at one end to project beneath a horizontalpin or projection 53, ri idly mounted on the edge of said swinging ever 39, and at its opposite end projects close to said plate 7 and beneath a horizontal bar 54.

As said bar 54 is depressed said lever 52 is 'adapted'to be engaged by same .and as it is turned on its raise same, thus clutch. Said horizontal bar 54; forms one .ject at an an side of a triangular frame 55, whit h is mounted on the face of said plate 7, the "detailed description of which will be taken up 'later. To positively close said clutch when it is brought into contact with said; stationary head 27, a lever 56 is pivotally mounted be tween its ends in the upper end of said swinging' lever 69, one end of which is adapted to bear upon the peripher limit the movement of saidlever in onedirection, and its opposite end is formed to prole slightly above the horizontal, on its under side, and is adapted to engage'a pin or projection 57, which is mounted on the face of said head 27 in the path of said lever. A spring 58 is provided, one end of which is secured to the upper end ,of said swinging lever 39,'and its free endis adapted to engage the outer end of said lever 56 and normallyhold the opposite end in contact'with said jaw 40. As said recipro eating dlutch is brought into contact with said stationary head 27 said lever 56. engagies said pin 57 and said jaw 40 is forced to in ch said wire in an obvious manner with a spring-pressure. Said head 38, between which and said head 25 said reciprocating head 36 is adapted to be moved, carries-the knives for cutting the wire, whose arrangem nt and .operation 1" will now describe.

S id head 38 is provided on its face opposite being curve and carries a knife 61*, rigidly mounted on same adjacent its middle portion and projecting at its forward end above the path of said wire. ,Said slide is provided with a horizontal projection 62, which projects rearwardly close to the face of said plate. 7 and into a horizontal slot 63 in said bar-54, by

pivotto engage saidpin 53 and positively opening said means of which it is adapted to be reciprocated vertically, The stationary knife 64 is rigidly mounted on one end of a block 65, which is mounted within a recess or opening 66 in the lower end of said head 38 beneath the path of said wire 13 and is adjustable horizontally in relation to the path ofsaid movable knife, so that said knives may be he t in close contact. vi ed with an upward extension 66 at one side of the cutting edge, which remains at all times beneath said movable knife and is beveled on its upper end, thus preventing sai movable knife end or the cutting edge 'of said stationary knife, regardless of the pressure with whic they re forced together. Said block is tally by means of a screw ly mounted in a plate 68 opposite the rear end of said block 65 and is adapted to engage a screw-threaded opening 69 in said block 65. In order that said station ry knife may be sharpened without destroying its usefulness, a longitudinal slot 70 is provided in the upper .side .of said block 65 beneath the wire and deeper adjacent said knife 64, so that as said y of said jaw 40 to 5 knife is ground down the movable, knife may depress the wire into contact with same. To return the severed end of said wire to' its normal position, so that-as it is fed forward into the forming devices it will be guided in-the right direction, a light spring .7 l is provided, secured at one end in the rear end of said slot 7 O beneath the path of said wire, and its forward end is adapted to force said wire into knives in relation to the forming mechanism,

tween the path of said wire and said plate 7 from catching on its upper held nits position and adjusted horizon- 67, which-is r'evolu' To feed and cut the wireto form staples of i said heads 25 and 38, which are united by Said knife 64 is pro- I effect the adjustment of the position of the I i other moving parts and is held securely in its saidguide-rods 37, are each provided with a projection 73 on their rear face, which fit in orizontal slots 74 in said plate 7 and are rigidly secured to a horizontal bar 75, which is mounted adjacent the rear face of said plate 7. Said bar 75 carries a horizontal threaded projection'7 6 at one end, which is adapted to enter the threaded central opening of a hand- Wheel 77, which is revolubly mounted on the back of said plate 7. Said wheel is held against relative longitudinal movement in relation to said plate 7 in a well-known manner and by revolving same said bar 75, and consequently said heads 25 and 38, may be adjusted horizontally. Said triangular frame 55, which operates said knife 61 and said lever 52*, is quite thin and lies flat against the face of said plate 7 behind all proper relative position by means of a projection 78, secured to its rear face, which fits a vertical slotor opening 79 through said plate 7 and directly'below said shaft 2. A plate 80 is secured on the rear end of said projection 78 and serves to hold said frame 55 in place and cover the lower end of said slot 79, in which a compression-spring 81 is mounted below 'said projection 78, which normally holds said frame 55 atthe upper limit of its movement. Said frame is depressed by a crank-pin 82, which is secured to the rear face of said cam 10 and which engages a 55, as illustratedin Fig. 19. A curved camslot 84 is provided in the upper end of said frame 55 eccentric to said shaft 2 and adapted to receive said pin 82in its upper end when said frame 55 has been depressed. To return said frame 55to its normal position positively, said cam-slot 84 is so placed that after said pin 82 has entered its u per end said pin will engage'the upper wal of said camslot and raise said frame, so that as said pin leaves said slot at a point nearly vertically eneath said shaft 2 said frame will have "reached its normal position and will be reposition by said spring 81 un The pin tained in said til again depressed by said pin 82.

82 is so placed on said cam 10 in relation to.

that portion of the periphery of the cam which. holds the lever 41 at one limit of its movement that the releasing-lever.52" and the knife 61 are operated after said lever 41 has come to rest and before it has been permitted to return to-its normal position.

Having described the feeding and cutting mechanism and the operation of same, I will now describe that part of the machine which forms and drives the staples.

Said cam 10 is provided with a cam-groove 85, which is adapted to operate the formingplunger 86, reci rocating said plunger vertical(l1y in its gui e 86*, which s mounted on sai plate 7 below said shaft 2., and holding it at its upper and lower limits of movement j durin about sixty degrees of the revolution of sai cam, said plunger being provided with a horizontally-projecting pin- 87, which enters said cam-groove 85. The relation between said cam 10, said pin 87, and said lever 41, and said pin 82 is such that said plunger 86 is held at until after said wire has been cut from which to form the staple and it begins to desgend before said frame 55 has reached the lip er limit of its movement, the reason for whic I will now explain. When said wire is being cut, the portion which is to be formed into a staple has to be firmly held in its position in relation to the forming devices. To accomplish this, a bifurcated jaw or head 88 is provid ed which is normally held with the slot or bifurcation 89 in the path of the wire and also in the path of said forming-plunger 86, which is provided with a central opening extending from its lower end in order that it may straddle same. Said jaw or head 88 is integral with a shank 90, which extends rearwardly and enters a sleeve or pocket 91, mounted on the rear face of said plate 7. Said shank has a reduced rear end 92, which passes through a central hole in the rear head of said sleeve 91, its outer end being provided with a laterally-projecting pin 93, which is arranged to limit the forward movement of said head 88. Within said sleeve 91 a spring 91 surrounds the reduced portion 92 of said shank and tends to normally hold said head 88 at the forward limit of its movement. The central upper portion of said head 88 is cut away and an auxiliary jaw 95 is inserted in said space, being pivotally secured-to said shank 90 and provided with an upward projection or tail 96, which projects adjacent to said plate 7. Within said slot 89 is mounted a fiat spring 97 which tends to hold said auxiliary jaw 95 raised sufficiently to admit the wire; and after the same has been fed into place said projection or tail 96 is adapted to e engaged by the stiff spring-tongue or pro-- j ection 98, which is rigidly mounted at its upper end on the frame 55, which isdescending at that instant to cut off the wire. Said spring 98 engages said projection 96 on its rear surface, and thus forces same forward, and consequently depresses the forward end and causes same to hold the wire as in 'a vise. Directly after the wirehas been cut and before said spring 98 has been released from said projection 96 said forming-plunger 86 begins to descend and the ends of the staple 99 are bent down, as shown in Fig. 3. Sometimes it occurs that in cutting the wire or for the upper limit of its movement some other reason the end is bent or sprung that so theaction of a spring of a staple-supporter 105".

formed and hold same 105 while said staple is being driven; vTh inner edge or face of'said supporter,

concave curved, is adapt d to carried on the outer grooves 105 on which are adapted to-receive the imountedat its-'a path of said wire practically fills said passage or opening 89. As the end of the'wire leaves said h ad 88 it enters between the face of said guide 6* and the inner surface of a-lever 100 which is pivotally face of said guide, their meeting faces adjacent the forming-plunger in line with said wire being divergent, as shown in Fig. 4, so the end of the wire enters between same itwill be guided in its roper direction, which is in alinement with t e previous path ofsaid wire. The outer lower corner of said forming-plunger isrounded, and said lever 100 is curved, so that its lower end can extend around said rounded corner and abut against said head88. As said forming-plunger86 begins to descend from its upper posh tion, as indicated in Fig. 3-, said'lever 100 is pushed out of the path of said plunger against 101, which tends to hold tire lower on of said lever against said head 88 and assumes Fig. 3.

Iii Figs. 6, 7 8, and 9 I have illustrated two different positions of the forming and driving mechanism. Mounted within said forminglungerand longitudinally movable therein is a driving-plunger 102, which extends above the'upper end of same and ends in a camyoke $03, the inner pe 'phe'ry of which is adapted to be enga ed by a crank-pin 104,

I aceof said cam 10,.to reciprocate said plunger to drive the staple after it has been formed, Said forming-plunget 86 is provided with small longitudinal the inner faces of its 1e s, legs'of 518 staple as, said plunger descends, the loop of the staple beingheld in said vise-head 88. '4 As said forming-plan the ends of the stap er descends it engages said head 88, and bends them downwardly to a vertical'position and against the side faces Said supporter is a triangular-shaped block and is pivotally x on the outer face of said plunger 86 and a ove the lower end of same.

aid supporter is adapted to enter betweenthe prongs of the step e just as said staple is firmly in said grooves e which is escends,

said dri'ving-plunger as said plunger and thereby cause said supporter to swing out of the 'ath of said. plunger; The lower end of said supporter is concentric with its pivot and is a apted toswing, out from be-. tween the prongs of said staple just above- The lower ends of the legs of sai the paper inte; which the staple is being driven.

former-plunger are adapted at the lower iimit'of movement ofsai-d', plunger to press the article.- being stapled and. hold samefirmly while the staple is beingd-ri-ven.

mounted in a recess in thethe position shown in wire -at each side of be enaged by said spring 105 Said straightflout at a slig supporter 105 is normallyhel'd in the posi tion illustrated in Fig. 7 by means of a flat s ring 105 which is secured at .one end to t e upper end ofsaid formerlunger 86 and is adapted to engagetlierear ace of a curved projection 106 on the upper end of said sup-' porter, and thereby force the .lower end of same rearwardly'. The free end of said spring is rounded, as shown at 107 so that as said sup orter changes its position itcan slide free y on the surface of said projection 106. As the lower end forced out of the path of said driving-plunger which necessarily is quite stiff, is straightened out and naturally becomes much stronger. At the same time very little pressure is required to hold said supporter'in its position; but as said spring is straightened its lower end is brought nearer the pivot of said supporter, and consequently exerts less power to hold the lower end of same rearwardly. The relation between saidcam-groove and cam-yoke 103 and crankpin 104 is such that as said-forming-plunger 86 begins to ascend after the staple is driven said driving-plunger follows more slowly, thus holding said staple-su porter in its outer position until as said ibrmer-plunger of said supporter-is continues to rise said projection 106 willengage the cam-surface 108, which is formed in the inner surface of a cap or casing 109,

mounted on theface of said (,gui'de86. Said projection will thus be force toward the face of said forming-plunger and the supporter ht distance farther out,

entirely out of the path of said driving-plunger. Said'driving-plunger'is provided on its side edges with sma ltongues or longitudinal projections 110, adapted to fit within said grooves and be accurately guided thereby; The lower end or oint of said driving-plunger is provide thereby swung a sli and it is thereby hel wit a lateral groove 111, adapted to partly embrace the loop of the staple to hold same steadily in place while it is bein driven. As said driving-plunger be "us to escend it enages the u per bevele surface of said viseead 88 an forces same back against the action of said sprin ing the loop of t e staple as said head 88 is withdrawn from same. Said su porter is then forced-put of the path of the cop of the staple and of. saidpressure of same on the rear concave surface of said supporten To hold said drivingplun er firmly against the book while the' clenc 'ng-leversareoperating, which occurs immediately after thestapleihas been driven, the lower ortion of said cam-yoke 103 is formed wit a small ortion of its periphery tal, as shown at 111, Fig 3. As said crankpin 104, which actuate's said plunger, moves over said surface '111, as shown in Fig. 8, itwill force said plunger down tightly against 91 out of its path, engagdriving-plunger by the t angle tothe horizon- 'vided with a hand-wheel 126.

staple.

the book and hold it there for a short interval of time. r

The clenching apparatus is mounted in'the outer end of said arm or support 8 and is operated by a cam 112, mounted on said shaft 2 within said standard 1, through a vertical rod 113, mounted in guides 114 within said standard and provided at its upper end with an antifriction-roller 115, revolubly mounted therein, which is held in contact with the pe riphery of said cam by a compression-spring 116, surrounding the lower end of said rod 113 and bearing on the upper surface of one of said guides 114 and at- .its .other end against a collar 11?, rigidly mounted'on'said rod. A horizontal lever 118', pivoted between its ends in said arm 3, transinitsmo.- tion from said vertical rod 113 to a vertical rod 119, which is mounted centrally in the outer end 120 of said arm Sand vertically beneath said driving plunger. A cylindrical column or shaft 121 is mounted in the upper end of the outer end 120 of said arm 8 concentric with said rod 119 and carries at its upper end a triangular-shaped head 122, within which the clenching levers are mounted. Said plates 9 are hinged together at their meeting edges and are supported on the inclined faces of said head 122, but may be raised to a horizontal position, as indicated in dotted lines in Fig. 1, and are supported in said horizontal position by hinged braces or struts. Said cylindrical column 121 is provided at one side with a projection 123, adapted to project through an opening in the wall of said arm immediately over a similar projection 124, integral with said arm, and said column 121 is adjusted vertically by means of a hollow screw 125, mounted in the lower end of the outer end 120 of said'arm 8, said screw being pro- Said rod 119 passes centrally through said screw and car- \ries at its upper end within said head 122 the reciprocating plunger 127 of the clenching device.

In Fig. 11 is shown the position of the parts of the clenching device in their normal position. of rest,'which they occupy up to the time that the staple is driven through the book 128, asshown in smaller size in Fig. 8. In Fig. 10 is shown'the final position of the for-.ning and driving p'lungers and the clenching device at the instant of completing the There are three parts in the clenching devicethe vertically-reciprocating plunger 127 and the two swinging levers 129, which are pivotally mounted one at each side of said plunger 127 on one wall of said head 122 on the pivots 130. Said swinging levers 129 are provided in one portion of their periphery with a straight portion 131,

which stand opposing each other and inclined atan angle of about forty-five degrees and in such a relation to the driving-plunger that the ends of the'staple as same are driven through the book will be received on said inclined surfaces and be bent toward each other. Said levers 129 are, provided with in- Wardly-curved tail portions 132, which are received in a out-away portion 133 of said plunger 127, said portions 132 of said levers being cut away on one side, as shown in Fig. 13, so that they can. pass the body of said plunger127. Said plunger 127 is provided with a T-shaped head 134, having anarrow upward central projection 135, adapted as said head is forced upward to swing said levers on their pivots and raise their'stra'ight surfaces to a horizontal position, -.as shown in Fig. 10. and also in Fig. 12 on an enlarged.

scale. Said head is widened out just below its upper end with reversely-curved arms, and the under surface of said levers 129 are formed to fit said curves, thus making the extreme points of said levers as strong as posis such that at no position is there any appreciable opening between same to permit of any foreign matter finding lodgment therein; also, that when the staple is completed, as shown in l 'igs. 1.0 and 12, the whole upper surface of the clenching mechanism is level and continuous without any openings in which anything can remain. A central groove is provided in the upper surface of said head 134 and levers 129 to assist in guiding and forming the staple in an obvious manner. A central narrow opening 136 is provided between said plates 9 to allow said clenching mechanism to operate.

Inadjusting my machine to stitch a book the part to be stitched and through which the staple is to be driven is first placed between the projections 123 and 124, and said head 122 is lowered until said projections are brought to bear on said book with the right degree of pressure, thus setting said head 122 and the clenching mechanism at the proper height in relation to said driving and forming mechanism so that the staple will be properly driven. The thickness of said book is noted, and the head 38, which carries the cutting-knives, is adjusted horizontally to its proper position to cut a staple of the proper length. This adjustment is assisted by means of a scale 137, provided on the face of'said head 38 and which appears from under the edge of said casing 109 as said head 36 is moved to cut longer staples. The position of said lever 41 is then adjusted to feed the Wire a proper distance.

loo

a Q j A casing 138 is provided to cover the working parts which are mounted on saidplate 7, and adoor139 is hinged to the front of .said casing, provided with glass 140', throu h which the various parts may be seen to facilitate the making of" the necessary adjust: ments;

I claim as my invention I 1. In'a machine [of the kind specified, astaple-formingldevice'comprising a vise adapted to engage t e middleportion formed and hold the same, a reciprocating forming-plunger adapted to straddle said vise and engage the end portions of said wire and bend. same to form the staple, a swinging block pivotally mounted on the face of sald projection its said projection adjacent one limit t1on and adapted to enga e of the kind specifi ed to hold said plunger, its free end being adapted to enter. between the legs of said plunger and between the le s of said staple as same is formed, a

curve projection, on said block adjacent'to and extending above its pivot at all positions of the block, a spring carried by said plunger and extending between the plunger and said free end being adapted to. engage said projection and hold said block in position between the legs of said staple, and astationary member havin a cam-surface isposed at an angle to the ace of the plunger and'carried by said'm'achine in .the path of of its mosameand hold said block out of the pat ofsaid drivingplunger and out of contactwith said vise.

2. n thestaple-forming device of a machine ed, the combination with, the bifurcated forming-plunger, of a swinging block pivotally mounted on the face of same its free end being adapted to enter between block aving a curved projection adjacent its pivot end, a spring carried by said plunger itsfree end engagin said held between the legs of said plunger and stasurface adapte' said plunger approaches one limit of its movehead, said ple, and a stationary member having a camto engage said projection as ment and move said block out from the-plungerand hold said block against the action of said s ring out of the path of said plunger.

. 3 na machine ofthe specified, the combination with the formin device, ofa on said, mafree end adjacent the path of said wire as said wire is fed through said forming vice the free end of said lever being beyeled on the surface'presented to said wire and adapted to guide the end of said wire in' its. proper course, said lever being free to be pushed out of the path of the forming-plunger as same descends to form the staple.

4. In the clenching device of a machine of the kind'specified, the combination with a reciprocating lunger provided with a T-shaped points of the prongs of of the wire to be 5. In a mac 'ne'o movement of the, wire laterally in formed 'said f the kind specified;

projection'and adaptlock so that its free end is movement of said plun er.

ead being formed narrow at' its.

apex and having reversely-curved side edges, of a pair of bell-crank levers pivotally mounted one on each, side of saidp unger and in the plane of said head and having a portion of their outline adapted to fit within. said reverselyecurved edges of said head, each of said levers being provided With a flat surface disposed at an angle inthe path of said staple, as same is driven and adapted to receive the said staple and ,force them toward each other, said plunger being adapted to turn said levers so that their flat surfaces are brought in line and at a right angle to the path of. said staple, the apex of said T-head being flat and adapted when said flat surfaces of said levers are in line to'li e in the same plane whereby the prongs of said staple will be firmly clenched'against the surface of the article bein stapl idhe kind described, a holding the staple-wire while theistavise for ple is being able into,

formed, comprising ahead mov and out of the path of the staple,-

driver, said head being provided with a slot in the path of the wire adapted to receive same, a bell-crank lever pivotally mounted on the shank of saidhead one end being adapted to extend into a slot in said headan above the path of the wire, operative means ada ted to engage the o posite end to cause sai lever to engage-said wire, and a s ring mounted within said shank said s ring ein attached at one end. to the sai lever an bearingat its free end on the bottom of the slot in the head and adapted to normally hold said lever out of the path-of said wire, tlligl free end of said spring serving to 'Jimit t i the head. 6. In a machine 0 clenching devices and means for operatmg. same, said clenching devicescomprising a lunger provided with a flat T-sha ed head aving a flat upper-face, a reverse .-curved face at each si e and a convex lower-face a clencher-j aw pivotally of said head and each'provided with an inclined flat upper face, a lower face adapted to fit into one of said curved side faces of said head when said inclined flat faces and said flat upper face of said head are brought into curved tailpiece adapted to exten beneath said convex lower face of said head, said levers being adapted to 'beloperated by the kind a coincident plane to clenchthe staple, and a- --7. In-a machine of t e specified, the

mounted at each side combination with staple forming and drivmg',v

mechanism, ofla staple-clenching device comp'ris'in a reciprocating plunger having a 'T- shape head with a parallel projecting flattopped central portion, a ever pivotall mounted adiacent each sid each of said evers being provided'with a fiat surface normally held at an angle to the direction of motion of the staple as it is driven,

e of 581d hea Bean's 1 coincidentplane and thus bend the prongs of said staple, the contacting surfaces of said levers and said IT-head being formed to prevent the ingress of any foreign-material be tween same at any relative position of saidmembers.

8. In a machine of the kind specified, the combination with a'Wire-feeding device, including a stationary wire-clamping device and a reciprocating wire-clamping device, a reciprocating knife and a vise adapted to hold the wire while the staple is being formed, of a reci rocatingframe, means for reciprocating said frame at intervals, means connecting said frame and said reciprocating wire-clam ing device, said vise being disposed in the path of movement of said reciprocating frame said frame being constructed and ada ted as it is reciprocated to contact with an close said vise, open the reciprocating clampipg device and operate said reciprocating. ife in the order named.

9. In a machine of the kind s ecified, a frame adapted to be'reciprocate at intervals,-a vise'forholding the staple-wire while the staple is being formed a reciprocating clamping device adapted to be opened at one limit of its movement, and a knife adapted to be reciprocated'to sever said wire, opera tive connection between said vise, said recip-' rocating clam ing device and reciprocating knife and sai reciprocatin frame whereby said vise, said clamping evice, and said knife will be operated in the order named and said vise Will be held in its closed position until the staple has been 'formed.

In testimony whereof I have signed my name in presence of two subscribing wi'tnesses.

, AXEL E. LIND. Witnesses: I

E. F. WILsoN, R. A. FIsonER 

